Side by side

Grand Seiko SBGH347vsSpinnaker Cahill Automatic

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

The bottom line

The 37mm SBGH347 wears 5mm narrower than the 42mm Cahill Automatic — that's a meaningful jump on most wrists.

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Grand Seiko SBGH347

The Grand Seiko SBGH347 is lauded for its refined 37mm Ever-Brilliant Steel case, impressive Zaratsu polishing, and classy ice-blue dial inspired by frozen waterfalls. Its Hi-Beat 9S85 movement is a significant draw, and the framed date window is preferred over a cyclops. Reviewers note the bracelet lacks micro-adjustment or a quick-change system, and some wished the 13.3mm thickness was slightly thinner on the compact case. Overall, reviewers praise the Grand Seiko SBGH347 for its elevated finish and value, with the Hi-Beat movement being a significant draw.

Spinnaker Cahill Automatic

Owners widely praise the Spinnaker Cahill Automatic for its attractive vintage-inspired design, comfortable wearability on smaller wrists, and good timekeeping, with one owner specifically noting the large "maxi" indices and NATO strap as highlights. However, some find the lume application uneven and note the use of a mineral crystal. A significant concern raised by one owner is a report of internal component failures and a perceived lack of quality control within the brand. On balance, the Spinnaker Cahill Automatic is well-regarded by owners for its style and value, particularly at specific price points, despite some noted manufacturing inconsistencies.

Where to get them

Check prices & track

Grand Seiko SBGH347
Grand Seiko SBGH347
MSRP $7,300
Spinnaker Cahill Automatic
Spinnaker Cahill Automatic
MSRP $350
SBGH347
Grand SeikoSBGH347
MSRP $7,300
Cahill Automatic
SpinnakerCahill Automatic
MSRP $350

At a glance

12 of 29 specs differ
Diameter
SBGH34737mm
Cahill Automatic42mm
Power Reserve
SBGH34755h
Cahill Automatic40h
Water Resistance
SBGH347100m
Cahill Automatic200m
MSRP
SBGH347$7,300
Cahill Automatic$350

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
37mm
42mm
Thickness
13.3mm
13.7mm
Lug-to-Lug
44.6mm
51mm
Lug Width
19mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

2 specs
AR Coating
Yes
Inner
Dial Color
Black
Green

Movement

2 specs
Caliber
9S85
SII NH35A
Power Reserve
55h
40h

Pricing

1 specs
MSRP
$7,300
$350

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